23-736 - Special height and setback regulations for sky exposure plane buildings

LAST AMENDED
12/5/2024


R6 R7 R8 R9 R10

In the districts indicated without a letter suffix, for #sky exposure plane buildings#, the height and setback regulations shall be as
set forth in this Section, inclusive.

#Buildings# may elect to utilize the front setback provisions of paragraph (a) of this Section, or the alternate front setback
provisions of paragraph (b) of this Section. Where elected, such provisions shall supersede the provisions of Section 23-43,
inclusive.

In R9 or R10 Districts, towers may penetrate a #sky exposure plane# pursuant to Section 23-737 (Tower regulations).
Notwithstanding the foregoing, for narrow #buildings#, the provisions of Section 23-738 shall apply.

(a)   Front setbacks

      If the front wall or other portion of a #building or other structure# is located at the #street line# or within the #initial
      setback distance# set forth in the following table, the height of such front wall or other portion of a #building or other
      structure# shall not exceed the maximum height above the #street line# set forth in the table. Above such specified
      maximum height and beyond the #initial setback distance#, the #building or other structure# shall not penetrate the #sky
      exposure plane# set forth in the table, except as otherwise provided in Sections 23-41 (Permitted Obstructions) or 23-737
      (Tower regulations).


                          MAXIMUM HEIGHT OF FRONT WALL AND REQUIRED FRONT SETBACKS


                       #Initial Setback Maximum Height                       #Sky Exposure Plane#
                             Distance#           of a Front
                                                  Wall or
                          (in feet)                    Height above
                                                                  Slope over #Zoning Lot# (expressed as a ratio of
                                                   other
                                                             #Street      vertical distance to horizontal distance)
                                                 portion of
                                                               Line#
                                                     a
                                                             (in feet)
                                                 #Building           On #Narrow Street#       On #Wide Street#
                                                 or Other
                                                Structure#
                                                 within the
                  On #NarrowOn #Wide                                   Vertical     Horizontal     Vertical   Horizontal
                                                  #Initial
                         Street#      Street#                             Distance      Distance      Distance    Distance
                                                 Setback
                                                Distance#


                                                               R6 or R7 Districts


                        20            15   60 feet or six      60        2.7           to 1          5.6         to 1
                                                 #stories#,
                                                whichever
                                                  is less


                                                             R8 R9 or R10 Districts


                        20            15   85 feet or nine     85        2.7           to 1          5.6         to 1
                                                 #stories#,
                                                whichever
                                                  is less
(b)   Alternate front setbacks

      If an open area is provided along the entire length of the #front lot line# with the minimum depth set forth in the table in
      this Section, the provisions of this Section may apply in lieu of the provisions of paragraph (a) of this Section. The
      #building or other structure# shall not penetrate the #sky exposure plane# set forth in the table, except as otherwise
      provided in Sections 23-41 (Permitted Obstructions) or 23-737 (Tower regulations).

      In R9 or R10 Districts, the provisions of this paragraph shall be inapplicable to any #development# or #enlargement#
      with more than 25 percent of the total #floor area# of the #building# in #residential use#.



                                        ALTERNATE REQUIRED FRONT SETBACKS


                    Depth of Optional Front
                                         Alternate #Sky Exposure Plane#
                           Open Area (in feet,
                           measured
                                          Height above
                                                     Slope over #Zoning Lot# (expressed as a ratio of
                           perpendicular to
                                                 #Street    vertical distance to horizontal distance)
                           #street line#)
                                                 Line#
                                                 (in feet)
                                                      On #Narrow Street#      On #Wide Street#


                    On #NarrowOn #Wide               Vertical    Horizontal   Vertical    Horizontal
                           Street#     Street#              Distance    Distance     Distance    Distance
                     R6 or R7 Districts



                     15          10         60          3.7         to 1          7.6         to 1


                     R8 R9 or R10 Districts


                     15          10         85          3.7         to 1          7.6         to 1